Apparatus for burning off glassware



June 18,k 1946.

c. w.sc|`-|RE1BER APPARATUS FOR BURNING OFF GLASSWARE 3 sheets-sheet 1OriginalFiled Nov. 6, 1941 June 18, 1946- l c. W. SCHREIBR, 2,402,452

APPARATUS FOR BURNING OFF GLASSWARE Original Filed'NV. 6, 1941 3Sheets-Sheet 2 ATTORN S gn@ l, E946. l Q W sCHRElBER 2,402,452

APPARATUS FOR BURNING OFF GLASSWARE Original Filed Nov. 6, 1941 5Sheets-Sheet 3 e4 21 e5' 45 O awfhnewf INVENTOR Eff/@M697 ATTOR EYPatented June 1s, 194e APPARATUS Fon BURNING oFF GLAsswARE i f Carl W.Schreiber, Toledo', Ohio, asslgnor, by mesne assignments, toOwens-Illinois Glass Company, Toledo, Ohio, a corporation of OhioContinuation of application Serial No. 418,036, November 6, 1941. -Thisapplication December 9, 1944, Serial No. 567,395

7 Claims.

My invention relates to improvements in methods of and apparatus forburning off glassware and more particularly is concerned with theseverance of a moil from an article of glassware and the formation of abead on the lip, or rim, of the article, which latter may be a tumbler,or similar piece of tableware.

An object of my invention is the provision of novel means whereby asatisfactory commercially acceptable bead may be produced irrespectiveof any irregularities in the wall thickness of the article. To this end.the invention provides for softening of the glass at the line ofseverance suiilciently to permit the necessary and desired stretching ofthe glass, prior to any relative axial movement between the moil andarticle and then by a regulably controlled stretching and burningthrough of the softened glass, simultaneously and uniformly separatingthe article and moil at all points of severance. Y Thus I materiallyreduce,

" if not entirely eliminate, any tendency to produce humps or lumps inthe bead, such as generally occur where the separation is largelyuncontrolled and results'from the pull of gravity upon either thearticle or moil.

The present application is a continuation of my copendinapplicationSerial Number 418,036,

led Nov. 6, i941, entitled Apparatus for burning off glassware.

Other objects will be in part apparent and in part pointed outhereinafter.

In the drawings:

Fig. 1 is a vertical sectional view of an apparatus embodying myinvention.

Fig..2 is a sectional elevational view taken substantially along theline 2--2 of Fig. 1.

Fig. 3 isl a sectional plan view taken substantially along the line 3-3of Fig. 1,.

Fig. 4 is a detail sectional elevational view showing the relativepositioning of the parts during the step of softening the glass at theintended line of severance. i Fig. 5 is-a view similar to Fig. 4, thesoftened glass having been stretched and nearly completely burnedthrough.

Fig. 6 is a similar view in which the moil has been separated from thearticle and the latter lowered away from the moil.

Fig. 7 shows the moil in the receiver and the article positioned for thebeading operation.

Fig. 8 is a fragmentary side elevational view showing the nished ytumberin position tobe removed from the apparatus.

Fig. 9is a view of the main control cam and illustrates the vrelationbetween successive steps 2 which constitute one .complete cycle ofoperatiOIlS.

Briefly, my inventionl comprises a chuck and burner unit, which isdesigned to support an article of glassware with themoil attachedthereto,

in a normal upright position, with the burner so placed relative to thechuck, that it will direct an annular flame against the glass at thedesired point of severance. 'I'his unit is movable vertically to bringthe moil into engagement withjaws which grip the moil and firmly hold itduring the burning-off operation. Both the chuck which directly receivesand holds the article and the jaws which grip the moil, rotate abouttheir common vertical axis to thereby eifect relative rotation betweenthe article of glassware and the an- 'nular flame. By means of camcontrolled mechanism the chuck is held against downward movement duringa preliminary glass softening period and immediately thereafter islowered a predetermined distance for the purpose of stretching the glasswhich has been softened and iinally sev.

ering it whereby to completely separate the arti- @1e and mon.Immediately thereafter, the 11p, or

wardly through said horizontal shelf .20 and a paratory to the burning oif of the moil.

The apparatus .comprises a base I5 which supports a frame It consistingof-a pair of spacedv uprights I1, the latter including apair of opposedVvertical slideways I8 in which a slide I9 is mounted for verticalreciprocation. This slide includes a forwardly lextending horizontalshelf 20 (Fig. 1) and thereabove a bracket 2|, which together, supportthe chuck 22 and burner 23" referred to heretofore.

The chuck 22 (Fig. 1) comprises a cup 24 open at its upper end andprovided at its lower end with a bearing 25 whereby the chuck is capableof rotation about its longitudinal vertical axis. This bearing 2-5includes a central sleeve 2B, con`- nected to a tubular shaft 21`whichextends downbracket 28. below which it is connected to gears forrotating it, as will be brought out hereinafter. are connected to avacuum supply pipe 30 whereby to permit the 'application of vacuum to a.perforated bottom plate 3| which due to said application of vacuum,rigidly attaches itself to the adjacent end of vthe article of glasswarebeing Cored passageways 29 in the sleeve 28l closed.

3 treated. This perforated bottom plate 3| is connected to a push rod 32which extends downwardly through the tubular shaft 21 and normallyterminates at a point in close proximity to the upper end of an ejectorrod 33 which inturn extends downwardly through the lower part of saidtubular shaft 21 where it is xed to the base I5, already described.

Rotation of the chuck 22 to impart rotary movement of the articlerelative to the flame, is obtained through mechanism including a pair ofgears 34, one of which is connected to the tubular shaft below thebracket 28, while the other is keyed to a second tubular shaft 35, whichextends substantially the entire height of the apparatus and is in partfitted into the vertical slide I9 (Fig. 3) The lower end of this lastnamed tubular shaft carries a bevel gear 36 which meshes with a pinion31. A horizontal shaft 31a and pinions 38 connect this pinion 31 and ahorizontal shaft 38 which forms part of a speed reduction gearing 39. Anelectric motor 40 operates through Pulleys 4|, a driving belt 42, shaft43 and said speed reducing unit 39, to drive the shaft 38e.

The burner unit 23 includesv a conventional burner ring resting upon theaforementioned horizontal bracket 2 I and axially aligned with the chuck22. Two fuel lines are connected to the burner ring. One line 44conducts f-uel gas to the burner continuously while the other line 45conducts oxygen thereto, the latter line being connected to a valve 46to be described later, which cuts off the supply of oxygen duringpreselected periods of the cycle of operations of the machine.

The moil gripping unit 41 (Fig. 1) which is positioned above the burnerunit 23, comprises a pair of jaws 48 pivoted to links 49 which dependfrom a head 50 attached to the lower end of a tubular shaft I. Thisshaft is journalled in bearings provided in a pair of vertically spacedarms 52 at the upper end of the frame I6 and at its upper end isconnected to a gear 53 running in mesh with a second gear 54, the latterbeing attached to the extreme upper end of the last named tubular shaft35. 'Through this arrangement the moil gripping unit is caused to rotatewith and at the same speed as the chuck 22. Opening and closing of theJaws 48 of the moil gripping unit 41 is obtained by mechanism includinga push rod 55, which extends downwardly through the tubular shaft 5| andat its lower end, carries a collar 56 which is connected through hingepins 51 to fingers 53 forming a part of said Jaws 48. The upper end ofthe push rod 55 extends above the plane of the gears 53 and 54 and isconnected by means of an arm 59 to an operating rod 60 which extends theentire length of the tubular shaft 35 and at its lower end has operativeconnection with a bell crank lever 3|, the latter being cam operated andfunctioning to impart axial movement to the operating rod 89, at regulartime intervals. A coil spring 62 encircling the push rod 55 between thegear 53 and said arm'59, normally tends to move the push rod verticallyupward and thereby hold the laws 43 .Immediately following positioningof the parts as illustrated in Fig. 1, both the chuck and burner aremoved upwardly with the article, to place the moil in a position.wherein it may be gripped by the jaws 43.'V Such upward movement of thechuck and burner as well as' later downward movement thereof, involvesvertical movement o! the slide n. This is obtained bymecrianisminshaft66.

4 cluding a rack bar 63 on one face of the slide meshing with a pinion54, the latter being driven by a gear 65 which is mounted upon a.horizontal A pinion 61 also carried by this shaft, meshes with avertical rack bar 68 which is mounted for sliding movement in a guide 69forming part of a stationary bracket 10 which also supports theaforementioned pinions, gears, and shafts. The lower end of the lastnamed rack bar 68, carries a roller 1I which rides upon the free end ofa pivoted horizontal arm 12. This arm is pivoted to a horizontal hingepin 13 on the last named bracket 10 and at its free end lcarries a camroller 14 which constantly rides upon a rotary cam 15, the function andconstruction of which will become apparent presently. Referring back tothe first named vertical rack bar 63 and particularly to Fig. 1, it willbe observed that this bar is adjustable vertically on the slide I9 bymeans of an adjusting screw 16 which is rotatively supported in abracket 11 provided at the upper end of said slide. By rotating thisscrew it is clear that the rack bar may be moved vertically relative tothe slide and thereby regulably control the operating position of thechuck and burner units. This is of importance and distinctlyadvantageous in setting the apparatus for the treatment of glassware ofdifferent height.

'I'he cam 15 referred to above; is mounted upon a horizontal shaft 18which is driven by the speed reducing unit 39. This cam, as will beapparent presently, regulably controls the relative movements of thechuck 22 and the moil gripping unit 41. Specifically, the cam 15 (Figs.l, 2, and 9) comprises a hub 19 which is keyed to the aforementionedshaft 18 and carries a radial plate 80, or flange, the peripheralportion of which is shaped to the contour necessary to impart thedesired movements to thechuck and burner units 22 and 23 respectively.The steps constituting a complete cycle of operations are believed to beclearly indicated in Fig. 9. The shortest radius of the cam whenuppermost functions to hold'the chuck and burner lowered for the loadingoperation. Simultaneously with such positioning of the chuck and burner,the push rods 32 and 33 (Fig. 1)' elevate the suction bottom plate 3| asindicated in Fig. 8, whereby to facilitate positioning of an articlethereupon. This loading position is represented by the referencecharacter A in Fig. 9. Immediately after the loading operation has beencompleted, that surface of the cam occupying zone B in Fig. 9, functionsto raise the chuck and burner and so position the moil with respect tothe Jaws 48 that the latter may be contracted into firm holdingrelationship to the moil and article. Through opening of the valve 48(Fig. l) oxygen is admitted to the burner 23 for mixture with the gas,the llame resulting from such mixture being intensely hot and operatingto soften the glass at the zone of intended severance thereof. It willbe observed by reference to Fig. 9 that during treatment of the glass inthe wall softening zone C, there is no relative movement whatsoeverbetween the moil and article.

After a predetermined degree of softening of the glass, the stretchingzone D is reached. Here the periphery of the cam 15 has its radiusshortened progressively to thereby effect a gradual stretching of thesoftened glass. In the latter portion of this zone D, the glass issevered and eects a complete separation of the moil and article. The

-beadingzones E and F follow and involve lowering -of the chuck andburner as a unit while the intensely hot ame continues ,to play upon theseverededge or lip of the article. Thus a uniform bead is provided uponthis edge portion. Followoperation or themen engaging jaws (Fig.l i) iscontrolled by the coil spring 62 and a pair of diametrically opposedcams 82 which engage one arm of the bell crank lever at regular timeintervals. One cam is 'shown in engagement with the bell crank lever inFig. l for the purpose of.

holding the spring 62 under tension and the jaws open preparatory toraising of the article to a position in which these jaws may grip themoil. The other cam 82 will similarly actuate the bell crank lever andcompress the spring 62 preparatory to removal of the moil from the jawsand depositioning thesame in the moil pan 83. or receiver, shown in Fig.'7 I y Control of the flow of oxygen to the burner is obtained by meansof a cam 84 which i's mounted upon the shaft 'I8 with the other cams,said cam 84 being constantly engaged with a roller 85 carried by aspring pressed movable valve member 8B.

spirit and scope of the appended claims.

I claim:

l. In apparatus of the character described, an article support adaptedfor engagement with the bottom of an article of glassware having a moilattached thereto, a burner positioned adjacent to one end of said'support and surrounding the article at its point'of juncture with themoil, a moil gripping unit positioned on that side of the burneropposite said support, the -axes of the support, burner, and moilgripping unit being in vertical alignment with one another, a cam,mechanism actuated by the cam for holding the burner and .supportagainst axial movement relative to said moil gripping unit during theapplication of a glass softening flame to the article, and also operableby said cam following the softening operation for effecting relativemovement between the moil gripping unit and support to. thereby effectseparation of the, article and moil axially and thereby stretch andfinally sever the glass in the softened area, a second cam, and meansactuated by said second cam for operating the moil gripping unit andthereby releasing the severed moil from said unit.

2. In apparatus of the character described, a slide mounted for verticalreciprocation, a pair of superposed horizontal brackets mounted upon oneside of the slide, a rotary upwardly opening chuck mounted upon thelower bracket, a ring type burner mounted upon the upper bracket inaxial alignment with and in fixed. relation to said chuck, moil grippingjaws positioned above the burner, suction means for securely holding anarticle with a moll thereo-n in said chuck, means for supplying acombustible fuel to said burner, means for closing the jaws about themoil, a cam and mechanism actuated by the .cam for moving the slideupward and then holding said chuck, burner and jaws against relativemovement duringra period in which the glass at the juncture of thearticle and moil is softened by the burner, said mechanism also operableby the cam for Modifications may be resorted to within the 6 then movingthe slide downwardly relative to the moil grippingjaws to. thereby lowerthe article and stretch and sever the softened glass.

3. In apparatus of the character described, a

slide mounted for vertical reci'procation, a pair of superposedhorizontal brackets mounted upon one side of the slide, a rotaryupwardly opening chuck mounted upon the lower bracket, a ringV typeburner mounted upon the upper bracket in axial alignment with and infixed relation to said chuck, moil gripping jaws positioned above theburner, suction means for securely holding an article with a moilthereon in said chuck, means for supplying a combustible fuel to saidburner,

release the moil, a rotary cam, mechanism operatively connecting the camand slide for moving the slide upward and holding the burner, and chuckagainst movementrelative to they jaws for a predetermined period of timeand then lowering the burner and chuck a predetermined distance relativeto said jaws to thereby stretch and sever the glass at the juncture ofthe article and moil, means for diminishing the intensity of chuckpreparatory to removal of said article, said mechanism including a rackbar attached to the slide and extending longitudinally thereof, a secondrack bar mounted for vertical sliding movement substantially directlyabove theaxis of rotation of said cam, a train of gears operativelyconnecting the rack bars, and means for effecting operative connectionbetween the lower f end of the second rack bar and said cam.

4. In apparatus of the character described, a slide mounted for verticalreciprocation, a pair of superposed horizontal brackets mounted upon oneside of the slide, a rotary upwardly opening chuck mounted upon thelower bracket, a ring type burner mounted upon the upper bracket inaxial alignment with and in fixed relation to said chuck, moil grippingjaws positioned above the burner, suction means for securely holdinganarticle with a moil thereon in said chuck,

means for supplying a combustible fuel to said burner. means for causingthe jaws to iirmly grip and release the moil, a rotary cam, mechanismoperatively connecting the cam and slide for moving the slide upward andholding the burner, and chuck against movement relative-to the jaws fora predetermined period of time and then lowering the burner and chuck apredetermined distance relative to said jaws to thereby stretch and,sever the glass at the juncture of the article and moil, means fordiminishing the intensity of the heat applied to the glass bysaidburner, means for elevating the article relative to the chuckpreparatory to removal of said article, said mechanism including a rackbar attached to the slide and extending longitudinally thereof, a secondrack bar mounted for vertical sliding movement substantially directlyabove the .axis of rotation of said cam, -a train of gears operativelyconnecting the rack bars, an arm pivoted for vertical swinging movementand positioned with its free end in contact with the llower end of thesecond named rack bar and a roller at said free end riding upon theperiphery of the cam.

5. In apparatus of the character described, a slide mounted yforvertical recii'irocation` a pair of superposed horizontal bracketsmounted upon one side of the slide, a rotary upwardly opening chuckmounted upon the lower bracket, a ring i5 type burner mounted upon theupper bracket in means for causing the jaws to firmly grip andv the heatapplied t0 the glass by said burner,. means for elevating the articlerelative to thev said chuck, moil gripping jaws positioned above theburner, suction means for securely holding an article with a moilthereon in said chuck, means for supplying a combustible fuel to saidburner, means for causing the jaws to iirmly grip and release the moil,a rotary cam, mechanism operatively connecting the cam and slide formoving the slide upward and holding the burner, and chuck againstmovement relative to the Jaws for a predetermined period of time andthen lowering the burner and chuck a predetermined distance relative tosaid jaws to thereby stretch and sever the glass at the juncture of thearticle and moil, means for diminishing the intensity of the heatapplied to the glass by said burner, means for elevating the articlerelative to the chuck preparatory to removal of said article, saidmechanism including a rack bar attached to the slide and extendinglongitudinally thereof, a second rack bar mounted for vertical slidingmovement substantially directly above the axis of rotation of said cam,a train of gears operatively connecting the rack bars, means foreiecting operative connection between the lower end of the second rackbar and said cam, and means including a rotary screw for adjusting thefirst named rack bar longitudinally of the slide to thereby compensatefor variations in the height of the articles of glassware being treated.

6. In apparatus of the character described, an article support adaptedfor engagement with the bottom of an article of glassware having a moilattached thereto, a burner positioned vadjacent to one end of saidsupport and surrounding the article at its point of juncture with themoil, a moil gripping unit positioned on that side of the burneropposite said support, the axes of the support, burner, and moilgripping unit being in vertical alignment with one another, a cam.

mechanism actuated by the cam for holding the burner and support againstaxial movement relative to said moil gripping unit during theapplication of a glass softening flame to the article and also operableby said cam following the softening operation for effecting relativemovement between the moil gripping unit and support to thereby eiectseparation of the article and moil axially and thereby stretch andfinally sever the glass in the softened area, a second cam, and meansactuated by said second cam for operating the moil gripping unit andthereby releasing the severed moil from said unit, the cam for operatingsaid moil gripping unit being'coaxial with the first named cam.

7. In apparatus of the character described, an article support adaptedfor engagement with the bottom of an article of glassware having a moilattached thereto, a burner positioned adjacent to one end of saidsupport and 'surrounding the article at its point of juncture with themoil, a moil gripping unit positioned on that side of the burneropposite said support, the axes of the support, burner, and moilgripping unit being in vertical alignment with one another, a cam,mechanism actuated by the cam for holding the burner and support againstaxial movement relative to said moil gripping unit during theapplication of a glass softening ame to the article and also operable bysaid cam following the softening operation for effecting relativemovement between the moil gripping unit and support to thereby effectseparation of the article and moil axially and thereby stretch andiinally sever the glass in the softened area. a. second cam, meansactuated by said second cam for operating the moil gripping unit andthereby releasing the severed moil from saidfunit, and means forrotating both cams continuously.

CARL W. SCHREIBER.

